From Serrières-sur-Ain
Main road
Col du Berthiand, 780 m, in Ain. Main climb: 6.3 km at 8.0% average, 509 m of climbing from Serrières-sur-Ain. The Tour de France has been over it 2 times since 2006.
Figures for the main climb (From Serrières-sur-Ain). The other climbs are further down.
| Main climb | Distance | Elevation gain | Elevation loss | Average gradient | Steepest 500 m | Difficulty index |
|---|---|---|---|---|---|---|
| From Serrières-sur-Ain | 6.3 km | 509 m | — | 8.0 % | 11.6 % | 4.1 Moderate |
| From Nurieux-Volognat | 3.3 km | 287 m | — | 8.7 % | 13.2 % | 2.4 Easy |
| From Poncin | 14.8 km | 568 m | 36 m | 3.8 % | 8.3 % | 1.9 Easy |
| From Matafelon-Granges | 14.9 km | 565 m | 66 m | 3.8 % | 12.4 % | 1.7 Easy |
Scroll the table sideways to see every column.
Main road
Minor road
Minor departmental road
Minor departmental road
4 ascents proposed here — other ways up this col remain possible.
Distances and elevation gains derived from the OpenStreetMap road network and a digital terrain model, measured on the very profile shown here.
Figures computed on 7 September 2026.
| Year | Stage | Cat. | First over the top |
|---|---|---|---|
| 2016 | Stage 15 | Category 1 | Rafał Majka |
| 2006 | Stage 18 Morzine → Mâcon | Category 2 | Sylvain Calzati |
Straight-line distances, not road distances. The cols a climb actually rides over are listed above.
The hardest climb of Col du Berthiand, from Serrières-sur-Ain, is 6.3 km long for 509 m of ascent, i.e. 8.0% average.
The steepest 500 m sits at 11.6%, and the hardest kilometre is the 1th, at 10.9%.
The Tour de France has crossed Col du Berthiand 2 times, from 2006 to 2016.
Sleipnir recognises the cols you cross from the GPS trace of your rides: the col ticks itself off the day you ride over it.
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